Saw support and guide.



No. 654,843. Patented July 3|, i900.

' H. P. SCHUFIELD. SAW SUPPORT ,AND GUIDE.

(Application Sled Mar. 24, 1900.)

(No Model.) v 2 Sheets'- SSSSS l.

Unull l'ff l u A M Miliz!" u IILHIIIININ? /Hv Y m: ams P'n'sns no. momumc wnsnmcmu n No. 654,843, Patented .my 3|, |900.

H. P. scHoFlEVL. l SAW SUPPORT AND GUIDE.

(Application led Mm; 24, 1900.) (No Model.) 2 Sheets-Sheet 2,

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llll" |2111 NITE STATES .1

I-IENRY P. sOIIOFIELD, OE CHICAGO, ILLINOIS, AssIcNOR OF ONEIIALE To L. L. EILsTRUP, OF sAME PLACE.

sAw SUPPORT AND GUIDE.

SPECIFICATION forming part of Letters Patent No. 654,843,11ated my 31,1eoo." 1 i Appnmnnfneanmhze,1900. summaries. montati.) f

T @ZZ whom it may concern,.-

Be it known that I, HENRY P. SOHOEIELD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have inventeda new and Improved Saw Support and Guide, of which the following is a specification.

My invention consists in an improved saw support and guide for `use in connection with Io saw-sharpening machines.

My primary object isi to provide a device of this nature adapted for use with doubletoothed band-saWs-that is, saws having teeth on both edges. j I5 A further object is to adjustably connecta guide of the improvedconstruction to a sawsharpening machine.

Automatically-acting saw-sharpening machines serving to feed a saw through or past 2o a machine and grind the teeth,are well known in the art. It is common to carry the saw around the machine during the grinding operation, one guide being provided at the machine and other independent guides being arranged at suitable :intervals about the machine. The present application will describe and claim my improved saw support and guide as applied to a grinding-machine, with only the most general reference to any means for 3o advancing the saw and grinding the teeth. In application, Serial No. 9,999, filed March 24, 1900, I show a complete machine of this nature embodying certain improvements in the feeding mechanism which are claimed in Said application.

In the accompanying drawings, Figure lis a view in front elevation of a saw-sharpening machine of common general construction, but equipped With my improved adjustable guide shown supporting a fragment of a double-toothed saw; Fig. 2, an enlarged broken view of a portion of the front of the machine and the adj ustable supporting-guide, certain parts being removed; Fig. 3, a broken vertical longitudinal section taken as indidicated at lines 3 of Figs. l and 2; Fig. 4, a broken horizontal section taken as indicated at line 4 of Fig. 2; and Figs. 5 and 6, transverse sections of the guide, taken as indicated 5o at the corresponding lines on Fig. 1.

A represents the front end of the frame of the machine; A', the rear end thereof; B, a portion of the mechanism for advancing the saw; B,a port-ion of the grinding mechanism B2, a rock-arm for moving the saw-advancing or feed mechanism at B; C, a fragment of a saw; D, a swinging guide-piece'of' common construction; D', a spring-clamp pivoted at a: and servingfto hold the guide-piece D yieldingly against the saw D2, asteel guide-strip 6e secured to the top of the frame-front A; E, a supporting-guide of improved construction adjustably connected with the front of. the frame, and E a hand-Wheel for raising and lowering said supporting-guide. i 65 The frontA of the frame is shown provided oniits outer surface with ribs a andon its inner surface at .its lower central portion'with a rib,V or lug a', Fig. 3. The front is also pro-v vided with a vertical guide-channel` a2, as 7c clearly shown in Fig. 2. Y

The adjustable supporting-guide E. comprises, preferably, a block or slide b, moving in the guide-channel a2, a horizontally-disposed stop-bar h', xedly secured centrally 75 to the block h by screws h2, 'a pivot-yoke b3, attached to the bar b by screws b4 and provided with an inwardly-projecting pivotal stud h5, a self-adjustin g horizontally-disposed supporting guidebar h6, provided with a chan- 8o `nel for the saw, set-screws o7, aording stops for limiting the movement of the bar b on its pivotal point, andi a stem bs, having threaded connection withlugs b9, on the block h and equipped with the hand-wheel E.

The guide-bar h6 is shown in 'cross-section in Figs. 5 and 6 as comprising a tempered-Jl steel saw-bearing strip c, of square cross-section, iianked by recessed. bars o', which receive the strip c and project above itlto af- V9o ford anges, and Wooden flange-blocks c2, re cessed to t over the strips c. `l-he'parts` are p secured together by bolts c3 and screwso The flange-forming portions of the'strips' c are separated by a `space c5, wider at th'e.bot-9 5 tom of the groove than at the top thereof to prevent the lower saw-teeth froxn'contacting with the side walls of the groove. The blocksc2 are separated by a slightly-narrower space o6 and serve to direct the saw in entering the roo groove formed bythe metallic flange members c'.

The screw' b8 is provided, Fig. 3,'withy 3 is shown a lug f, which vlimits the, down-f ward swinging-of the part D. The arms at the lower end of the piece D whereat said piece is pivoted extend belowsaid pivot and at an angle to the upper portion of the guidepiece. The lugf is in position to be engaged by one of said arms when the guide is thrown down;

The method of inserting the saw is well understood in machines ofthe general `character described. The wooden blocks c2 guide the saw to its proper channel, where it rests upon the steelchannel-bottom o of the guide-v bar h6. In feeding the saw slides on said channel-bottom. The iiange-blocks c2 and the upper margins of the flange members 'c' bear against the body of the saw and prevent the teeth on the lower edge from digginginto the sides of the channel. The saw is advancedtooth by tooth and ground inthe ordinary manner, The channel-bottom is preferably, though not necessarily, of hardened steel. The strip c is not necessarily made. in a single length. VPreferably it is of square cross-section.

As shown in Fig. l, a small space is Aleft be-V tween the points of the set-screws 197 and the lower surface of the bar h6 to permit the bar to-adjust itself within limits.

What I claim as new, and desire to secure by Letters Patent, is-,

l. In a saw-sharpening machine, the cornbination with the frame thereof, of a self-adjusting pivotally-supported saw-supporting guide-bar connected with the frame and provided `with a bearing for the saw-teeth, and stops for limiting the movement of said bar v on its pivot, substantially as and for the purpose set forth.

2. In a saw-sharpening machine, the combination with `the frame thereof, of a vertically-movable slide connected with the front end of the frame, means for adjusting said slide, a guide-bar pivotally connected to said slide, and stops carried by said slide for` limiting the movement of said guide-bar on its pivotal point, substantially as and for the purpose set forth. j

3. In-a saw-sharpening machine, the combination with the frame thereof, of a vertically-movable slide connected with the front end of the frame, means for adjustingsaid slide, a stop-carrying bar fixedly secured to bination with a-frame provided at its front end with a vertical guide-channel, a slide movable in said channel', a stop-bar secured to said slide, adjustable stops connected with said bar,a guide-bar pivotally `supported from said slide and -limited in movement by said "stops, and means for raising and lowering justing the slide, substantially as and for the purpose set forth. l v

6. 'In a saw-sharpening machine, the combination with a frame provided at its front end with a vert-ical guide-channel, of a slide` movable in said channel, means for adjusting the slide, a stop-bar b fixed to said slide,

`a pivot-yoke b3 fixed to said bar b and provided with a stud b5, a guide-bar pivoted on said stud, and stops on the .barr b for limiting the movement of the guide-baigfsubstantially as and for the purpose set forth.

7. In a saw-sharpening machine, the combination with the frame, of a self-adjusting pivotally-supported guide-bar provided with a channel of sufficient width at the bottom to receive the lower edge of-a saw freely and of less width'some distance above said bottom to cause the body of the saw to be guided by the flanking walls of the narrower portion of the channel, whereby contact of the teeth at the lower edges with the side walls of the channel is avoided, substantially as and for `the purpose set forth.`

8. In a saw-sharpening machine, the combination with the frame, of a guide-bar provided with a channel supplied at its bottom with a separately-formedhardened-steel bearing-strip upon which 'the saw rests, substan- .said channel, and servingto" direct the saw into said channel without injury to the loweredge teeth, substantially as and for the purpose set forth.

HENRY P. SOHOFIELD.

In presence ofl D. W. LEE, A. D.VBACCI'.

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